/**
 *  Copyright (C) 2006 zhangbo (freeeob@gmail.com)
 *
 *  This product is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation; either version 2.1 of the License, or
 *  (at your option) any later version.
 * 
 *  This product is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 * 
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 *
 *  author:zhangbo
 *  Email:jsjava@gmail.com
 */

/**  The Gamma class references to org.apache.commons.math.special.Beta */

function Erf(){
	this.jsjava_class="org.apache.commons.math.special.Erf";
}

/**
 * Returns the error function erf(x).
 * @param x the value.
 */
Erf.erf=function(x){
	var ret = Gamma.regularizedGammaP2(0.5, x * x, 1.0e-15, 10000);
    if (x < 0) {
        ret = -ret;
    }
    return ret;
};